Answer:
[tex]y = 4x - 19[/tex]
You should also try solving it yourself to make sure I did not make any mistake.
Step-by-step explanation:
We already know the slope so, so far the equation should look like this.
[tex]y = 4x + b[/tex]
Now we just need to insert the point into the equation. So point (7,9) 7 should replace the x and 9 will replace the y. It will look like this:
[tex]9 = 4 \times 7 + b[/tex]
when you solve this equation you'll get b
[tex]b = - 19[/tex]
So the equation is
[tex]y = 4x - 19[/tex]
